front wheels (help needed please)

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front wheels (help needed please)

Post  zzr prid on Sat 26 Feb 2011, 11:00 am

Hi all
Built the front wheels almost a year ago. Have now gone to fit them to the engine and i have a problem.

I can't screw the 8BA screws into the hub, as excess resin has come up through the holes.

What is my next step ?

Thank for the help

Prid


Last edited by zzr prid on Sun 27 Feb 2011, 7:57 am; edited 1 time in total

zzr prid

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Re: front wheels (help needed please)

Post  zzr prid on Sun 27 Feb 2011, 6:22 am

Hi all
Some one in work today suggested that i re-tap the hole with an 8ba tap.

Is this the way to go? If so should i re-drill the hole first ?

Thanks for the help
Prid

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resin

Post  lynnr on Sun 27 Feb 2011, 6:36 am

You may be able to use a pencil gas torch to heat up the resin and allow the screw to be threaded in.

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Re: front wheels (help needed please)

Post  zzr prid on Sun 27 Feb 2011, 7:42 am

lynnr wrote:You may be able to use a pencil gas torch to heat up the resin and allow the screw to be threaded in.

Would it be better to heat up the screw, then screw it into the thread so i don't disturb the rest of the resin on the inside face of the hub ?
thanks for the help
prid

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Re: front wheels (help needed please)

Post  Kevster on Sun 27 Feb 2011, 8:05 am

run a tapping size drill or slightly smaller down into the hole then carefully re tap the hole.

probably be best to use 8ba taper tap then follow it up the the plug tap, take things nice and slowly dont use too much force and back off frequently.

hope this helps

Kev

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Re: front wheels (help needed please)

Post  bjwlancashire on Mon 28 Feb 2011, 1:12 am

One additional point, if the resin has come up the threaded hole past the threads into the hole in the outer hub you may find that a tapping drill does not follow the tapped hole.

If this is the case, and only if - I would recommend using a drill the same size as the clearance hole first. Go in carefully in small amounts until you reach the threaded portion. This ensures that when you use the tapping drill you are in line with the threaded portion. Use the tappng drill to clear the resin in the threaded part.

As Kevster says, go easy on the tapping, 1/4 or 1/2 a turn at a time and turning back 1/2 turn each time to clear the resin you have cut.

Brian

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Re: front wheels (help needed please)

Post  zzr prid on Thu 03 Mar 2011, 2:13 am

Thanks for all the help.
What size drill should i use for an 8ba tap ?

Thanks
Prid


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Re: front wheels (help needed please)

Post  Waterways on Fri 04 Mar 2011, 12:21 am

Tapping drill for 8ba is 1.8mm

Keith

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Re: front wheels (help needed please)

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